That is just not always possible. An example that should be familiar to HN: I worked for a period at startup, and used my email at that startup (my only work email at the time, as that’s where I was working!). Then the startup ran out of money money and was sold. Hence the email no longer worked.

Should I have waited until the startup had more revenue? We were profitable at the time (we were B2B and the layoffs did us in)